Across
- 4. how strong or weak a sound is
- 5. to move quickly back and forth
- 7. how high or low a sound is
- 8. movement that takes energy from place to place
- 9. used to push two objects apart
Down
- 1. plane slanted surface
- 2. an inclined plane wrapped around a rod
- 3. machines tools that make it easier to do work
- 4. a bar used to lift something
- 6. dark or shaded area